PURPOSE: To effectively utilize the waste bricks which are used in steel making and, the life of which runs out.
CONSTITUTION: Of the waste bricks which are used in steel making and, the life of which runs out, the MgO-contg. waste bricks of an MgO-C system, Al2 O3-MgO-C system, etc., are used as a slag forming material for ladle refining, the waste bricks of an MgO-Cr2O3 system and Mg-CaO system are used as a repair material for an electric furnace, the waste bricks of the MgO-Cr2O3 system are used as a tap hole packing material for a bottom tapping type electric furnace, and the Cr2O3-contg. waste bricks of an Al2O3-Cr2O3 system, MgOCr2O3 system, etc., are used as a Cr recovering source and slag forming material in stainless steel refining.
NAKADA HIROYA
MIZUTANI TAKAYASU
